Find suitable mid point

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Sajid Rahim
Sajid Rahim 2017-9-7
编辑： Sajid Rahim 2017-9-7
this is my code
%%%%%%%%%%%%%%%%%%%%%%%%%
clear all;
[filename pathname]=uigetfile('*.jpg;*.png;*.tif;*.tiff;*.gif;*.bmp;');
inputimage=imread([pathname filename]);
I=inputimage;
I = rgb2gray(I) ;
[y,x] = find(I) ;
figure
imshow(I)
hold on
plot(x,y,'.b')
plot(x(1),y(1),'*y')
plot(x(end),y(end),'*r')
line([x(1),0],[y(1), 0])
line([x(end),0],[y(end), 0])
figure(1);line([0 1],[0 1]);
%%%%%%%%%%%%%%%%%%%%%%
i wana to find the mid point between the yellow point and red point.... the mid poit is that point where the curve become bended........... as shown the point by arrow...
orignal image
ofter code

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